Publication detail

Incorporation of temperature and plastic strain effects into local approach to fracture

KOTRECHKO, S. KOZÁK, V. ZATSARNA, O. ZIMINA, G. STETSENKO, N. DLOUHÝ, I.

Original Title

Incorporation of temperature and plastic strain effects into local approach to fracture

Type

journal article in Web of Science

Language

English

Original Abstract

An unjustified simplification of the local quantitative criterion regarding cleavage nucleation is a key problem in the utilisation of the Local Approach to Fracture (LA), particularly to predict the fracture toughness within the ductile-to-brittle transition (DBT) region. The theoretical concept of the effect of both temperature and the plastic strain value on the crack nuclei (CN) generation rate in iron and ferritic steels is presented. It is shown how the plastic strain and temperature affect CN formation rate and, as a consequence, govern the shape of the temperature dependence of fracture toughness K-Jc and its scatter limits. Within the framework of the microscopic model proposed, dependences of the CN bulk density on the plastic deformation value and temperature are predicted. Convenient approximation dependences for incorporating this effect into the LA are suggested. The experimental data of reactor pressure vessel steel and cast manganese steel demonstrate that the use of these dependences enables one to predict, with sufficient accuracy, the effect of temperature on the value of fracture toughness and its scatter limits over the DBT region. It is shown that accounting for both the temperature and strain dependence of CN bulk density gives rise to the invariance of parameters of the Weibull distribution to temperature.

Keywords

fracture toughness; ductile-to-brittle transition; local approach to fracture; ferritic steel

Authors

KOTRECHKO, S.; KOZÁK, V.; ZATSARNA, O.; ZIMINA, G.; STETSENKO, N.; DLOUHÝ, I.

Released

15. 10. 2021

Publisher

MDPI

Location

Basel

ISBN

1996-1944

Periodical

Materials

Year of study

14

Number

20

State

Swiss Confederation

Pages from

1

Pages to

11

Pages count

11

URL

https://www.mdpi.com/1996-1944/14/20/6224

Full text in the Digital Library

http://hdl.handle.net/11012/204028

BibTex

@article{BUT176298,
  author="Sergiy {Kotrechko} and Vladislav {Kozák} and Oleksandra {Zatsarna} and Galina {Zimina} and Nataliya {Stetsenko} and Ivo {Dlouhý}",
  title="Incorporation of temperature and plastic strain effects into local approach to fracture",
  journal="Materials",
  year="2021",
  volume="14",
  number="20",
  pages="1--11",
  doi="10.3390/ma14206224",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/14/20/6224"
}